NCCCO Signals and Communication Standards 5

Question 1

When two signal persons are needed on a job site, how should crane operator instructions be managed?

Accepted Answer

A lead signal person must be designated, and only that person gives signals to the operator

Answer

Only one designated lead signal person may give signals to the crane operator at any given time to prevent conflicting instructions.

Question 2

What is the correct hand signal for 'Retract Telescoping Boom'?

Accepted Answer

Both fists together, thumbs pointing toward each other, moving hands inward

Answer

Retract telescoping boom is signaled by both fists with thumbs pointing inward, moving the hands toward each other.

Question 3

If a crane operator loses radio contact with the signal person mid-lift, what is the correct immediate action?

Accepted Answer

Stop all crane movement immediately and re-establish communication before continuing

Answer

Loss of radio communication mid-lift requires an immediate stop of all crane movement until communication is re-established.

Question 4

What does a signal person indicate when they hold one hand up with all fingers extended and then drop the hand quickly?

Accepted Answer

'Emergency stop — stop all movement immediately'

Answer

A hand raised with all fingers extended and then rapidly dropped signals Emergency Stop, requiring all crane movement to halt immediately.

Question 5

Which statement about voice communication via radio for crane operations is correct according to OSHA 1926.1419?

Accepted Answer

Voice commands must use the same terminology as standard hand signals

Answer

OSHA requires that voice commands over radio use the same standard terminology as hand signals to ensure clarity and consistency.

NCCCO (National Commission for the Certification of Crane Operators) Practice Test